Implement asyncSend() for dcstream

Change-Id: I7fadc9435f00bee26ed55e704d66965bbe8ec059
Add cmake error output in case dependencies for core library are missing
Give status message in case core library cannot be built.
Get version macro right
CR

Change-Id: Id0f705b8f4fd0edf004332f09e6a6d910a33a110
Merge pull request #2 from tribal-tec/review

Code review